JPH11343991A - Ladder device in manhole for installation of submerged pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate use of protrusive steps on the wall surface of a manhole, facilitate execution of works with no specification about the piping directionality, and allow easy and safe operations within the manhole. SOLUTION: This ladder device for a manhole is configured so that guide hooks 7, 7 attached to a submerged pump P are engaged from the sides of guide rails 6, 6 for elevation and sinking of the pump and step rods 8, 8 protruding to the side face opposite the guide hook engaging direction are installed from above to below the guide rails 6, 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole tapping device provided with a submersible pump.

[0002]

2. Description of the Related Art As is well known, in a manhole in which a detachable submersible pump is installed, as shown in FIG.
Step 80 for workers to go up and down during installation and inspection
A # 80 protrudes from the upper part to the lower part of the wall surface, and the guide rail 60 for raising and lowering the pump and the discharge pipe 50 guided from the detachable bend 30 are connected to the above-mentioned step 8.
It is provided close to the wall surface in the direction opposite to the protruding side of 0 ‥‥ 80.

As described above, since the front and rear diameters in the narrow manhole are further narrowed by the projections of the steps 80 to 80, the size of the pump to be installed is restricted, and Working inside the manhole becomes extremely difficult, with the step 80 ‥ projecting behind it.
It is often the case that an operator is hit on the # 80 and gets injured. In addition, the introduction position of the inflow pipe 20 and the lead-out position of the discharge pipe 50 must also be set so as to detour in a direction avoiding steps 80 to 80, which greatly restricts the piping.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a manhole in which a detachable submersible pump is installed, since it is not necessary to protrude a step on the manhole wall as in the prior art, regardless of the directionality of the piping, and it is suitable for construction. It is an object of the present invention to provide a tapping device that can be easily and safely performed inside and easily.

[0005]

In the manhole tapping apparatus according to the present invention, a pair of two guide rails for elevating and lowering are arranged side by side in the required number of manholes in correspondence with the number of submersible pumps installed. A guide hook extending in the opening direction of the discharge port and extending to the both sides is engaged with the guide hook from the inside or outside of the guide rail, and is opposed to the engagement direction of the guide book. A foot rod protruding to the side in the direction is disposed from the upper part to the lower part of the guide rail. Since the worker can move up and down by this foot-holding rod, it is not necessary to provide a step on the manhole wall.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments will be described below with reference to the drawings.

1 is a manhole, 2 is an inflow pipe of sewage, P is a detachable submersible pump submerged in the manhole 1, 3 is a detachable bend for detachably connecting the discharge port 4 of the submersible pump P, 5 is a detachable bend This is a discharge pipe that is guided upward from the bend 3 and stands upright along the wall surface of the manhole 1, and the upper end thereof is led out from the wall surface of the manhole 1 and communicates with a predetermined drainage channel. Numeral 6 is a guide rail for ascending and descending two pairs, for example, two submersible pumps submerged in the manhole 1 and four submersible pumps if there are two submersible pumps. The required number of pumps P are arranged at a position close to the discharge pipe 5 in accordance with the number of pumps P installed. Reference numerals 7, 7 are guide hooks attached to the submersible pump P and led out in the opening direction of the discharge port 4 and have the leading ends protruding to both sides, and these guide hooks 7, 7 guide the guide rails 6, 6. Is engaged from the inside or outside direction. Numerals 8 ‥‥ 8 denote foot rods arranged from the upper part to the lower part of the guide rails 6, 6, and the guide hooks 7, 7 are provided on the guide rails 6, 6 as shown in FIGS. When engaged from the inside, the guide hooks 7, 7 as shown in FIG.
When they are engaged from the outside of the guide rails 6, 6, they are arranged to protrude to the side in the opposite direction to the engagement direction of the guide hooks 7, 7, such as to the side in the inward direction. The tapping device is configured at a position close to the standing position of the discharge pipe 5 by the foot-holding rods 8 # 8. There is no need to protrude the steps.

[0008]

According to the present invention, in the manhole 1 in which the detachable submersible pump P is installed, the step which has been conventionally provided on the wall surface opposite to the standing position of the discharge pipe 5 and the guide rail 6 is provided. Because there is no protrusion like
If the manhole diameter is the same, a pump one rank larger than the conventional one can be installed. Then, there is an advantage that the work in the manhole 1 at the time of raising the pump can be easily and safely performed. Further, the introduction position of the inflow pipe 2 and the lead-out position of the discharge pipe 5 can be set in any direction without restriction, which is extremely convenient in terms of construction. Furthermore, since the adjacent guide rails 6 and 6 are connected by the footing rods 8 # 8, the effect of reinforcement and prevention of bending is also produced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a main part of a manhole provided with a tapping device of the present invention, showing an example in which a foot-holding rod is provided on a side surface of a guide rail on an outer side.

FIG. 2 is a cross-sectional plan view of a main part of a manhole provided with the inventive ramp device, showing an example in which a foot-holding rod is provided on a lateral side surface of a guide rail.

FIG. 3 is a cross-sectional plan view of a main part of a manhole provided with the inventive ramp device, showing an example in which a foot-holding rod is provided on a side surface in an inward direction of a guide rail.

FIG. 4 is a longitudinal sectional side view of a main part of a conventional manhole,
This shows a state in which a step for raising and lowering an operator is protruded from a wall surface in a direction opposite to a direction in which a discharge pipe and a pump elevating guide rail are erected in a manhole.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole 4 Pump outlet 6 Guide rail 7 Guide hook 8 Foot rod P Submersible pump

Claims (1)

[Claims] 1. A pair of ascending and descending guide rails are arranged in parallel in a required number of manholes corresponding to the number of submersible pumps installed, and are attached to the submersible pump and led out in the opening direction of the discharge port. A guide hook having an extension end protruding to both sides is engaged from the inside or outside of the guide rail, and a foot-holding rod projecting to a side surface in a direction opposite to the engagement direction of the guide book is attached to an upper portion of the guide rail. A tapping device for a submersible pump-installed manhole, which is disposed from the lower part to the lower part.